All good replies. I live in WV and for the first week at least it is 40 or less in the mornings, often around 30, depending on the year. I like to pattern at 40 degrees. This tells me what my patterns are going to be at this time. You will have a little fall off at 30 degrees, but you will have tightening as it warms up.
Better to shoot now and know what your pattern is than to shoot in 2 weeks and have problems 2 days before the season.